It's the most realistic ending, but the saddest. Though even if it is hentai logic. What made this guy so special that all of them decided to share him? One could argue, handsome, dependable, and unlike the other guys using that app at least treats em well enough. He is better supposedly compared to what the people in their old lives where. I mean, all of them had pretty sad backstories. But I wonder what has them so quick to sleep with one guy instead of just rooming for a while and let the first two girls have him?
Chapter 3? Nice!
Ah yes, and our POV protagonist has finally come around to building an actual harem as the saviour of runaway girls, huh.
And that ending, or rather, To Be Continued? So, a promise of even more POV chapters? Amazing, definitely can't wait to see more!
A more cynical person might have taken the word "Pray", regarding the app, to really mean "Prey" ... but for now it seems to have worked out fine for the P.O.V. MC (the Lucky Bastard).
Guess what happened to the sister will have to wait for the next chapter, eh?